Improvement in stopping mechanisms for looms



J. MEGSGN. sToPPING-MECHANISM Fon LooMs.

kN ,195,767, Patented 0ct.2,1877.

WITNESSES:

ATTORNEYS.

N. PETERS, PHOTO-UTHOGRAPM-ER. WASHINGTON, D C.

PATENT OFFICE.

IO-HN ME'GS'ON, "OF SOUTH ADAMS, MASSACHUSETTS.

IMPROVEMENT `IN STOPPING MECHANISMS FOR VLOOMS.

Specification forming part'of Letters Patent No. 195,767, dated October2, 1877; application filed July 9, 1877.

To all 'whom it ma/y concern:

Beit known that I, J HN MEGsON, of South Adams, in the county ofBerkshire and State of Massachusetts, have invented a new and ImprovedFork- Olearer or Stop -Motion for Looms, of which the following is aspecification:

This invention has relation to looms, and especially to those loomswhich are designed for weaving gured fabrics.

My object is to stop the motion of a loom in the event of the weft orfilling running out or breaking, if such motion of the loom is permittedby the fork being operated by the end of the thread which has been leftby the shuttle. Such weft or thread permits the motion of the loom tocontinue in two ways, viz., by getting entangled on the fork and also bylying in the box in such a position as to cause the fork to move. Inboth cases the loom will run as if there was filling in the shuttle, andif more than one kind of filling is being used an imperfect pattern willbe produced, or it will be necessary to adjust the pattern-chain.

In the case referred to, when the thread catches on the fork, the newattachment breaks it off, and when it lies in the box it slackens it,taking away its resistance to the fork.

In the annexed drawings, Figure lis a front elevation of some of theworking parts of a power-loom, partly in section, showing myfork-clearer applied on the protection rod.

` Fig. 2 is a longitudinal section through the loom, taken in the planeindicated by dotted lines x a', Fig. 1. Fig. 3 is a top view in detail.

Similar letters of reference indicate corresponding parts.

The letter A designates the frame of the loom; B, the lay. B1 B1 arearms connecting the lay with an oscillating shaft located at the bottomof the loom-frame. The lay receives vibration from' cranks on the maindrivingshaft B2 acting through the medium of pitmenrods, in the usualmanner.

The shaft B2 carries on one end fast and loose belt-pulleys a a', and apinion spur-wheel, O, which engages with a large spur-wheel, C', on ahorizontal cam-shaft, D.

The right-hand end of the lay has a shuttlebox, E, applied to it, and atthe opposite end of the lay are two vertically-movable shuttleboXes, EE', which are mounted on a rod that receives endwise movements from camsconstructed and acting through connections in the usual well-knownmanner.

The picker-staves F F are arranged and operated as usual, and theshuttles are of the well-known kind.

G designates the protection-rod, which is free to oscillate ineye-bearings b b', fixed to the front side of the lay B. On one end ofthis rod is an arm, c, having a V-grooved head, c', on it, and on theopposite end of this rod is an arm, d. A spring, s, presses the arms c(l against the flat heads of the bowed andhingcd tongues c of theshuttleboxes, and holds these heads against the boxes, as shown in Fig.1.

On this protection-rod I secure by a setscrew a saddle, g, to which issuitably fastened a curved finger, l1., which extends upward andforward. This fm ger is thrown down out of the way when a shuttle is ineither one of the boxes by the said shuttle pressing out the end of oneof the tongues, e, against one or the other of the arms on the ends ofthe protection-rod G.

At the right-hand end of the reed is the upright slotted guide J, whichis fixed to the lay in line with the fork K, which is pivoted to the endof a slotted holder, L, and is constructed with a hook on its longestarm. (Shown in Fig. 2.) The holder is applied between guides on a block,f, which is secured rigidly to the breast-beam A', and it is attached toa hook formed on the upper end of an arm, i. The arm z' is free tovibrate forward and backward, and it is secured to a shaft, j, under thebreast-beam. One end of the shaft j is extended through the righthandcheek of the frame A, and is formed with a crank on its end, as shown inFig. 3, and in front of this cranked end is an arm, I, which is acted onby a spring to throw it outward. This arm is eX- tended up through anL-slot in a plate, k, and it has combined with it, in a suitable manner,means for shifting the main driving-belt.

When arm I is in the position shown in Fie. 3, the driving-belt will beon the fast pulley a, and the block f will be advanced toward the lay.Should anything occur to press the block with its fork in the oppositedirection, the cranked end of shaft j will cause arm I to shift the beltand stop the motion of the loom.

The curved finger h is vibrated as the shuttles enter and leave theboxes, and it moves back and forth with the lay. When a shuttle leaves aboX during' the back stroke of the lay, the :finger h rises, so that onthe returi'i of the lay this finger is in a suitable position forbreaking` a thread 011 the fork.

A bent lever, N, which has its fulcrum on a stud iixed to the right-handcheek of the frame A, engages with the hooked end ofthe fork K at aproper time, and lnoves back the block f with its fork. Lever N isactuated by lneans of a single-throw cam, m, on the shaft I).

The operation of my fork-clearer is as follows: The curved finger isplaced on the protection-rod, between the edge of the web and theweft-fork, moving` back and forth with the lay. The end of the finger isa little higher than the edge of the cloth when the shuttle is out ofthe box, and, when the weft has caught on the fork and the reed is closeto the cloth, the finger will be near the breast-beam. As the la)v isthrown fully back, the nger passes under the thread that has been caughton the fork and is just back of it, While the shuttle has left lthe box.The end of the finger is then caused to rise high enough to catch thethread and break it, the la)v then returning to beat up the weft.

Having' thus described my invention, I claim as new and desire to secureby Letters Patent- The combination, in a loom having a singleshuttle-box 011 one side and two or more on the other, of theprotector-rod G, having the finger or fork clearer h and swell-lingers,with the fork K, and mechanism fol` operating' the same, as and for thepurpose specified.

J OHN MEGSON.

Witnesses:

J oHN FIRTH, CHARLOTTE MEGsoN.

